KR-20260064575-A - SYSTEMS AND METHODS FOR IDENTIFYING A LOCATION OF A THERMAL EVENT DETECTED BY A TEMPERATURE SENSING TAPE

KR20260064575AKR 20260064575 AKR20260064575 AKR 20260064575AKR-20260064575-A

Abstract

Systems and methods for identifying the location of a thermal event detected by a temperature sensing tape are provided. In some embodiments, the temperature sensing tape may include a resistive ladder having parallel resistors between a plurality of temperature sensing elements to create voltage dividers, and unique analog output voltages may correspond to other elements among the plurality of temperature sensing elements that are activated. In some embodiments, pulses injected and reflected by the temperature sensing tape may be used to detect the distance to the location where the triggering event is detected.

Inventors

마르티스 클라란
피네다 마르틴
골루보비치 보리스
잘타우스카스 아르놀다스
돔스 마르코
미세비시우스 리만타스

Assignees

리텔퓨즈 인코퍼레이티드

Dates

Publication Date: 20260507
Application Date: 20251027
Priority Date: 20241030

Claims (20)

Regarding temperature sensing tapes, Insulated support structure; A plurality of temperature sensing elements electrically connected in series and disposed on the insulating support structure; and Each resistor (respective resistor) connected in parallel between each of the plurality of temperature sensing elements and disposed on the insulating support structure Includes, A triggering event detected by one of the plurality of temperature sensing elements is Changing the impedance of one of the plurality of temperature sensing elements and causing an open circuit within the plurality of temperature sensing elements downstream of the one of the plurality of temperature sensing elements, Temperature sensing tape.
In paragraph 1, A conductive circuit comprising a plurality of temperature sensing elements, a resistor connected in parallel between each of the plurality of temperature sensing elements, and a flexible conductor disposed on an insulating support structure between the plurality of temperature sensing elements. Includes more, The output voltage of the above conductive circuit is Indicating which of the plurality of temperature sensing elements detected the triggering event, Temperature sensing tape.
In paragraph 2, A pull-up resistor at one end of the above conductive circuit Includes more, The above output voltage is Measured at the above pull-up resistor, Temperature sensing tape.
In paragraph 2, amplifier circuit electrically connected to the above conductive circuit including more Temperature sensing tape.
In paragraph 1, A conductive circuit comprising the plurality of temperature sensing elements, the respective resistors connected in parallel between each of the plurality of temperature sensing elements, and a flexible conductor disposed on the insulating support structure between the plurality of temperature sensing elements. Includes more, The first output voltage at the first end of the conductive circuit is Identifying a first temperature sensing element among the plurality of temperature sensing elements that detect the triggering event, and The second output voltage at the second end of the above conductive circuit is Identifying a second temperature sensing element among the plurality of temperature sensing elements that detect the triggering event, Temperature sensing tape.
In paragraph 1, The above plurality of temperature sensing elements It includes a PPTC sensor (polymeric positive temperature coefficient (PPTC) sensor) or a PTI sensor (printed temperature indicator (PTI) sensor), and Each of the resistors connected in parallel between each of the plurality of temperature sensing elements is including a low-temperature coefficient material having high resistance, Temperature sensing tape.
Regarding temperature sensing tapes, Insulated support structure; A plurality of temperature sensing elements electrically connected in series and disposed on the insulating support structure; and A flexible conductor disposed on the insulating support structure and arranged in series with the plurality of temperature sensing elements to form a conductive circuit Includes, A triggering event detected by one of the plurality of temperature sensing elements is A change in the impedance of one of the plurality of temperature sensing elements and an incident pulse signal injected into the conductive circuit is reflected by one of the plurality of temperature sensing elements to become a reflected pulse signal. Temperature sensing tape.
In Paragraph 7, The time difference between the incident pulse signal and the reflected pulse signal is Indicating which of the plurality of temperature sensing elements detected the triggering event, Temperature sensing tape.
In Paragraph 7, The above conductive circuit is Having uniform impedance in the absence of the above triggering event, Temperature sensing tape.
In Paragraph 9, The flexible conductor disposed between two of the plurality of temperature sensing elements is A waveform shape for increasing the length of the flexible conductor and the electrical distance traveled by the incident pulse signal and the reflected pulse signal without increasing the physical distance between two of the plurality of temperature sensing elements, Temperature sensing tape.
In Paragraph 7, Increasing the inductance and capacitance of the above temperature sensing tape is Decelerating the above incident pulse signal and the above reflected pulse signal, Temperature sensing tape.
In terms of method, An operation of detecting a triggering event by one of a plurality of temperature sensing elements of a conductive circuit disposed on an insulating support structure of a temperature sensing tape and electrically connected in series with a flexible conductor; An operation of changing the impedance of one of the plurality of temperature sensing elements in response to the detection of the triggering event to create an open circuit within the plurality of temperature sensing elements downstream of one of the plurality of temperature sensing elements; and Operation of outputting an output signal from the above conductive circuit Includes, The above output signal is Indicating which of the plurality of temperature sensing elements detected the triggering event, method.
In Paragraph 12, Each resistor Each of the above plurality of temperature sensing elements is connected in parallel, The above output signal is including output voltage, method.
In Paragraph 13, The operation of measuring the output voltage at a pull-up resistor located at one end of the conductive circuit; and An operation to identify which of the plurality of temperature sensing elements corresponds to the output voltage within a lookup table for the temperature sensing tape. including more method.
In Paragraph 13, Operation of amplifying the output voltage with an amplifier circuit electrically connected to the conductive circuit. including more method.
In Paragraph 13, An operation of measuring the output voltage at the first end of the conductive circuit to identify the first temperature sensing element among the plurality of temperature sensing elements that detect the triggering event; and An operation of measuring the output voltage at the second end of the conductive circuit to identify the second temperature sensing element among the plurality of temperature sensing elements that detect the triggering event. including more method.
In Paragraph 12, The above output signal is A reflected pulse signal which is a reflection of an incident pulse signal injected into the conductive circuit and reflected by one of the plurality of temperature sensing elements. including, method.
In Paragraph 17, An operation to measure the time difference between the incident pulse signal and the reflected pulse signal; and Operation of identifying which of the plurality of temperature sensing elements corresponds to the time difference for the temperature sensing tape. including more method.
In Paragraph 17, Operation of matching the impedance of the plurality of temperature sensing elements with the impedance of the flexible conductor in the absence of the triggering event to generate a uniform impedance within the conductive circuit. including more method.
In Paragraph 19, The flexible conductor disposed between two of the plurality of temperature sensing elements is A waveform shape for increasing the length of the flexible conductor and the electrical distance over which the incident pulse signal and the reflected pulse signal travel without increasing the physical distance between two of the plurality of temperature sensing elements, method.

Description

Systems and methods for identifying a location of a thermal event detected by a temperature sensing tape Cross-reference regarding related applications This application was filed on October 30, 2024, and claims priority under 35 U.S.C. §119 to U.S. Provisional Application No. 63/713,851 titled “SYSTEMS AND METHODS FOR IDENTIFYING A LOCATION OF A THERMAL EVENT DETECTED BY A TEMPERATURE SENSING TAPE,” the entire disclosure of which is incorporated herein by reference. The present disclosure generally relates to temperature sensing devices. More specifically, the present disclosure relates to systems and methods for identifying the location of a thermal event detected by a temperature sensing tape. For example, electrical systems and devices, such as batteries and semiconductors, can be damaged by high-temperature conditions if they are allowed to persist. Therefore, it is common for electrical systems and devices to be equipped with temperature sensing devices that can be used to measure temperature changes at individual locations inside or on the surface of the electrical systems or devices. For example, if the measured temperature exceeds a predetermined threshold, the protected associated electrical system or device may be automatically switched off until the condition subsides or is corrected, thereby preventing or mitigating damage to the associated electrical system or device. Some known temperature sensing devices include a temperature sensing tape containing temperature sensing elements at individual locations on or inside it. These devices output a digital signal (e.g., high or low) to identify a thermal event, but they do not identify the location of the thermal event. Accordingly, when the temperature sensing tape is attached to an electrical system such as a battery pack, the output signal identifies that a thermal event has occurred in the battery pack, but does not identify which cell of the battery pack the thermal event occurred in. The present disclosure may be useful in relation to these considerations and other considerations. This brief summary is provided to introduce, in a simplified form, selected portions of the concepts that are described in more detail in the detailed description below. This brief summary is not intended to help identify the principal or essential features of the claimed technical idea or to determine the scope of the claimed technical idea. In some embodiments, the temperature sensing tape may include an insulating support structure, a plurality of temperature sensing elements electrically connected in series and disposed on the insulating support structure, and a respective resistor connected in parallel between each of the plurality of temperature sensing elements and disposed on the insulating support structure. A triggering event detected by one of the plurality of temperature sensing elements may cause a change in the impedance of the one of the plurality of temperature sensing elements and an open circuit within the plurality of temperature sensing elements downstream of the one of the plurality of temperature sensing elements. In some embodiments, the temperature sensing tape may include a conductive circuit comprising a plurality of temperature sensing elements, a resistor connected in parallel between each of the plurality of temperature sensing elements, and a flexible conductor disposed on the insulating support structure between the plurality of temperature sensing elements. The output voltage of the conductive circuit may indicate which of the plurality of temperature sensing elements has detected the triggering event. In some embodiments, the temperature sensing tape may include a pull-up resistor at one end of the conductive circuit, and the output voltage may be measured at the pull-up resistor. In some embodiments, the temperature sensing tape may include an amplifier circuit electrically connected to the conductive circuit. In some embodiments, the temperature sensing tape may include a conductive circuit comprising a plurality of temperature sensing elements, a resistor connected in parallel between each of the plurality of temperature sensing elements, and a flexible conductor disposed on the insulating support structure between the plurality of temperature sensing elements. A first output voltage at a first end of the conductive circuit may identify a first temperature sensing element among the plurality of temperature sensing elements that detect the triggering event, and a second output voltage at a second end of the conductive circuit may identify a second temperature sensing element among the plurality of temperature sensing elements that detect the triggering event. In some embodiments, the plurality of temperature sensing elements may include a polymeric positive temperature coefficient (PPTC) sensor or a printed temperature indicator (PTI) sensor, and each resistor connected in parallel between each of the plurality of temperature sensing